测井约束地震反演技术在河4井复杂断块区的应用研究

河4井区位于东营凹陷中央隆起带。由于该井区断裂系统复杂、储层横向变化大、地震资料品质差，使得对该区沙三中、下段储层的砂体分布认识不清，制约了对这一新层系的勘探开发。在该区应用测井约束地震反演技术，以精细的层位和断层解释为基础，建立符合复杂断裂带地质规律的波阻抗模型，通过反演得到了高分辨率的波阻抗数据体。利用波阻抗反演数据体进行储层预测，揭示复杂断裂带内砂体的分布规律和储层的沉积规律。利用此法共描述砂体30个，提出有利钻探目标15个，为勘探开发位于该井区的河13断层下降盘沙三中、下段储层提供了充足的依据。

Application of logging-restrained seismic inversion to study complex fault block in He-4 well block.

He-4 well block situates in central ridge zone of Dongying sag,because of complex rift system in that well block,poor seismic data quality and rapid lateral variation of reservoir,the distribution of the sand body of middle and lower reservoir of S 3 Formation is unclear,which restricted the exploration and development of the new bed set.The logging-restrained seismic inversion technique is applied in the area,taking fine interpretation of layers and faults,building up wave-impedance model conformed with geologic rule of complex rift zone,the wave-impedance data volume with high-resolution is finally obtained by inversion.Using wave-impedance inversion data volume to implement reservoir prediction,distributed rule of sand body and sedimentary rule of reservoir in complex rift zone are revealed.Total 30 sand bodies have been described by using the method,15 favorable drilling targets have been presented,provided a solid basis for developing middle and lower reservoir of S 3 Formation in down-dropped block of He-13 fault in that well block.